1 Chronicles 25:5-8

5all these were sons of Heman the king's seer in the words of 1God, to exalt his power; and 2God had given to Heman fourteen sons and three daughters.

6All these were under the direction of their fathers Asaph, Jeduthun, and Heman, for song in the house of Jehovah, with cymbals, lutes and harps, for the service of the house of 3God, under the direction of the king.

7And the number of them, with their brethren that were instructed in the songs of Jehovah, all of them skilful, was two hundred and eighty-eight.

8And they cast lots with one another over the charges, the small as well as the great, the teacher with the scholar.